@jackofalltrades @FantasticalEconomics @phiofx @phil_stevens @GeofCox @504DR @lienrag @gerrymcgovern there are also no "sacred" assumptions. People remove them and change them and try to work without them all the time. There are discussions about what the assumptions rule out and what happens when they are removed.
Also, the vast majority of economic research is empirical and these assumptions are only applicable to theory. Empirical work uses Statistical assumptions.